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In the 1990s, Louisiana is terrorized by multiple serial killers; the Zachary Police Department discovers the key to solving their cases when a pattern emerges with personal items missing from each local victim.

Mark of a Serial Killer

Keys to a Killer

A serial killer taunts Wichita, Kan., for decades by sending brazen letters and taking credit for horrific kills; at the introduction of the computer era, the killer gets sloppy and accidentally leaves a digital clue.

Bound to Kill

The I-5 corridor in California is taken over by a brazen bandit who terrorizes the highway with a blitz of assaults and murders; the only clue to the killer's identity is a specific athletic tape used to bind his victims.

Killer Athlete

Numerous women are found dead by the side of the road with a unique ligature that looks like a dog collar and leash; detectives are stumped until a 17-year-old girl manages an escape from a vicious kidnapper, leading police to a serial killer.

Collar and Leash Killer

A rash of young men goes missing around Chicago during the 1970s; when bodies start washing up in the river, a pattern emerges; a small piece of evidence leads police to the home of a model citizen, where his furnace puts the suspect in the hot seat.

The Smell of Death

In the 1990s, New York is on edge as a killer leaves coded clues at crime scenes and declares his compulsion to choose victims by their birth signs.

The Other Zodiac

Brooklyn shopkeepers are afraid of closing time as a killer shoots his victims while locking up their stores.

Deadly Design

In the summer of 1976, the NYPD are chasing a man shooting at couples in parked cars with a gigantic, .44 caliber handgun; he taunts the city with terrifying letters until police get a lead about a suspect who has shot a neighbor's dog.

Deadly Summer

Minnesota police hunt for a killer caller who confesses to a string of murders in a chilling, high-pitched voice, begging for forgiveness; no one can identify him until one woman survives a brutal attack.

Killer Caller

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Following serial killers on the trails of their obsession and taking a deep dive into the killers' depraved psyches to reveal their darkest secrets as investigators close in to end the killers' reign of terror.

S2 E3 | Deadly Design